Nauru

under the terms of a security deal signed in December 2024, Australia and Nauru agreed to “deepen and expand security cooperation” and “consult and consider” in the event of threats; Nauru pledged to seek Australia’s agreement before it signed any bilateral accords on maritime security, defense, and policing, and would receive Australian financial assistance in support of Nauru's police and security needs Nauru has a "shiprider" agreement with the US, which allows local maritime law enforcement officers to embark on US Coast Guard (USCG) and US Navy (USN) vessels, including to board and search vessels suspected of violating laws or regulations within Nauru's designated exclusive economic zone (EEZ) or on the high seas; "shiprider" agreements also enable USCG personnel and USN vessels with embarked USCG law enforcement personnel to work with host nations to protect critical regional resources (2025)

no regular military forces; Nauru Police Force